ds18b20 to lcd

H

HAZELEB

Member
Hi There
My project for three ADC inputs LDR for day & night & two pot`s for day & night temp using the ds18b20. I used the FRM010 serial LCD firmware to send the temp reading out to the display and I have that all working. However I have now connected the LCD direct to the picaxe 18A.Have managed to initialise the LCD but I just can’t get my head around sending the temp reading to the display any help would be appreciated
 
B

BeanieBots

Moderator
Not sure exactly which bit you are having the problem with but would guess that you were using feature of adding # to the variable name to get the data to display in ascii. If this is the case, then try ading "0" (b0=b0+"0") to convert to ascii.
 
H

HAZELEB

Member
Hi Beaniebots

I’m a new comer to picaxe and programming. Now the bit I’m having the problem with is sending the temperature to the LCD.I used b3 for the readtemp.

DisplayTopline:

EEPROM 6,(“Temperature”)

FOR B11=6 TO 11
READ B11,byte
GOSUB SendDataByte

MoveCursorToStartOfSecondLine:

Byte=$CO
GOSUB SendCmdByte

The program works fine to here.
--------------------------------
----------------------------------

DisplayBottomLine:

Now what do I put here to send the temp to the LCD?

Many thanks

Hazeleb


 
B

BeanieBots

Moderator
Without knowing what or how your sub routines work, I would suggest something along these lines.
Assuming you have not already used b4 and that b3 holds a valid positive (worry about negatives later) temperature reading.

b4=b3/10 'get tens of degrees
byte=b4+"0" 'add "0" to convert to ASCII value
GOSUB SendDataByte 'send it to LCD
b4=b3//10 'get the units value (see let command)
byte=b4+"0" convert to ASCII
GOSUB SendDataByte 'send it to LCD

Try that and see if you get the desired result. I don't know which varibles you have used within the subroutines so b4 might not be spare. If you have already used it, then pick another one.
 
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